Improvement in dental forceps



P.N.JACOBUS.

DntalForceps.

PatenedIDe. 26, 1871..

i ATES PATENT OFFICE.

IMPROVEMENT IN DENTAL FORCEPS.

To all whom -it may concern:

Be it known that I, PETER N. JAcoBUs, of Montague, in the county of'Sussex and State of N ew Jersey, have invented a new and usefulImprovement in Dental Forceps 5 and I do hereby declare that thefollowingI is a full, clear, and exact description of the same,reference being -had to the accompanying drawing forming part of' thisspecification, and in which- Figure 1 represents a side view of myimproved forceps in the hand of the operator ready for use, and Fig. 2 aview in perspective of said instrument.

Similarletters of reference indicate corresponding parts.

My improvement in forceps for dentists use consists in a cross-handle toone or the main jaw,

constructed to lit the palm of' the hand, and designed to be held inposition by the thumb and two lesser iingers, while the other fingers ofthe hand are employed in holding or operating the. other jaw of theinstrument, and is combined with a peculiar construction of' the saidlesser jaw, which is formed, or, providing' it with a cross-piece andfin ger-guard, arranged to receive the two first fingers in betweenthem. A dental forceps thus constructed or provided possesses manyadvantages over the forceps in ordinary use, being more easily orgenerally adaptable to different kinds of' work, and capable of beingmanipulated with greater convenience and power.

The forceps represented in the drawing is crooked at its forward portionto adapt itto operating on the front part of the mouth; but it may beotherwise--thatis, laterally crooked-t0 adapt it to other parts of themouth.

A represents the main jaw, and B the secondary one. The pivot b of' thejoint is arranged close to the forward portion of the instrument,whereby a powerful leverage is obtained, and the points or lipsc c mayin all cases be within the mouth and handles of' the forceps, out ofthe-way of the teeth and opposite the latter; also,

allowing of an advantageous moyement of the jaws relatively to eachother when opening' and closing the main jaw, A being slotted to allowof the other jaw B fitting at its shank portion 4within it. The pointsor lips c c of' the jaws may be fitted for bicuspids, molars, or wisdomteeth, foreither side and either ja'w of the mouth, by

Specification forming part of Letters Patent No. 122,254, dated December26, 1871.

suitably changing the hold of the instrument ip the band, thus giving auniversality to the in strument-that is, as far as the size of the teethwill adinit-consequentl y dispensing with a multiplicity of' similarinstruments. The points or lips c c, however, may be made to nicely liton any particular tooth, fang, or alveolar to be rc moved in any part ofthe mouth, and either. be made sharp for cutting through the alveolar 0rremoving a part of' it, or be file-cut to give a firm hold on the tooth,or be smooth for sliding readily on decayed fangs. is constructed orprovided with a cross-handle,

G, constructed so as to lit the palm ofthe hand, and serving mainly toforce the instrument up onto the tooth, fang, or other part to beremoved; also, for drawing the instrument down and for giving it theinward and outward m0- tion, and rotating or other action usual inloosening a tooth. The other jaw B is constructed with a cross-piece, D,and linger-guard E, to rc-` ceive between them the first two lingers,while the cross-handle C is grasped in the palm of the hand and held inplace by the thumb and two lesser fingers. This construction gives apowerful gripe to hohl on to the tooth, as well as a. powerful hold todraw the tooth, andthe fin gerguard E provides bearings for the outwardpressure of' the lingers to open the jaws and to adjust them' onto thetooth, 01 to prevent their closing while forcing them onto the tooth 5and the contraction or shutting ofthe same fingers, by pressin g on thecross-piece D, combined with tlm gripe of' the handle C in the palm ofthe hand, effects `\the closingofthe jaws. y

A forceps constructed as described is easily entered within the mouth,and admits of the largest possible command over the instrument.

Vhat is here claimed, and desired to be secured by Letters Patent, is-V 1. The combination of' thecross-piece l) with the lesser jaw.B andmain jaw A having a crosshandle, C, essentially as described.

2. The combination ofthe iinger-guard E with the cross-piece D of thejaw B, and cross-handle O of the jaw A, substantially as specified.

' PETER N. JACOBUS. Vitnessesz' JASON K. C. FULLER,

Go'rTFRiED WIELAND. (46) The'one or main jaw A

